James h



(No Model.)

J. H. NORTHROP. LOOM SHUTTLE Patented May '7, 189 5.

I v Int/ 1201? UNITED STATES PATENT @FFICE.

JAMES H. NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO v GEORGE DRAPER & SONS, OF SAME PLACE.

LOOM-SHUTTLE'.

SPECIFICATION. forming part of Letters Patent No. 538,977, dated. May 7, 1895. Application filed September 16 1892- Serial No. 445,081. (No model.)

.To 00% whom it may concern:

Be it known that 1, JAMES H. N ORTHROP, a subject of theQu'een of Great Britain residing at Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Loom-Shuttlea of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention has for its object to improve the construction of that class of self-threading shuttle described in United States Patent No, 454,8l 0, granted to me June 23, 1891.

That patent shows a shuttle body having a central slot leading substantially to its point, said slot being intersected by a rigid horn down under which and into the thread delivery eye of the shuttle the bobbin thread is passed during the first return of the shuttle to the shuttle box after having been supplied with a filled bobbin.

In this, my present invention, I have devised a metal frame adapted for easy insertion into and to be securely held in the shuttle, and this frame has a spring finger or point crossing the threading slot, said spring yielding readily to the passage of the weft, but resisting the escape of the weft from the slot.

The particular features in which my invention consists will be pointed out in the claims at the end of the specification.

Figure 1 is a top or plan view of a shuttle, containing my improvements; Fig. 2, an enlarged section in the line 00, Fig. 1. Fig. 3 is an under side View of the metal frame detached; Fig. 4, a side elevation thereof; Fig. 5, one end of the shuttle-body with the metal ,frame omitted; and Fig. 6 shows the springframe to be described, and leave a side opening to constitute the delivery eye for the shuttle.

The metal frame is composed chiefly of a hollow hub b, provided with a laterally and forwardly projecting wing or lip 12, the latter covering part of the opening a when the hub 12 is put into the space a, and depending from the lip is a thread depressing horn b which terminates short of the lower end of the hub, so as to leave a portion b about which the thread may be drawn and serve as a tension between the slot 2 and the delivery eye in the shuttle body.

The hub is provided with a deep slot 2 for the reception of the weft thread, and the wall of the slot is-shown as shouldered as at 3 to prevent the riding of the thread up out of the slot. The hub is provided with a threaded hole for the reception of a fastening screw 0, and when the screw has been inserted into the hub, and the latter is secured in proper position in the shuttle body, the screw is locked by a suitable lock shown as a pin 0 drawn through a hole drilledin the screw and into the hub. The frame referred to ,has a projecting spring d which constitutes the acting end of the horn b and crosses the slot 0 at an angle, the said spring yielding to the descent of the weft to below its point when drawn into the slot 0, but actually preventing the escape of the said weft upwardly out of the said slot after having once passed the point. In practice, in order that this spring point may readily yield to downward pressure yet resist the upward movement of the thread, I have made it as a thin spring twisted to give it a sort of spiral trend. The thread entering the slot 0 and passing below the spring point will then, by further strain on the thread and change of position of the thread and shuttle, be depressed by the inclined lower edge of the horn b until the thread is carried into the bottom of the slot 2 and so as to pass partially around or against the portion 12 of the frame or hub, and out through the open slotted delivery eye of the shuttle.

While I have shown the bobbin as held in a holder, it will be understood that my invention is not limited to such construction, and that the self-threading contrivances described are applicable to any loom shuttle.

Having described my invention, what I 5 claim as new, and desire to secure by Letters Patent, is

1. The combination with a shuttle body having a self-threading slot 0 substantially coincident with the longitudinal center of the :0 bobbin, and into which the shuttle thread leaving the tip of the bobbin may be automatically led by the movement of the shuttle through the shed, of a spirally twisted finger arranged in the said threading slot, to oper- 15 ate, substantially as described.

Witnesses:

WM. W. KNIGHT, GEO. OTIS DRAPER. 

